Malicious PDF — malware analysis report

Static analysis result for SHA-256 68338cb9ba17cf0a…

MALICIOUS

PDF

81.8 KB Created: 2021-03-29 07:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c64ffbe0c3c23a80f63e474839c25860 SHA-1: 44230340be33643a64aa431c102d2d925495d2ca SHA-256: 68338cb9ba17cf0a957827d31c1829920ae86bc0ea6d3144986f066ef43ea29c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/wix?keyword=fury+punk+band PDF link annotation
    • http://santaparker.store/39863355694jk66x.pdfIn PDF document text
    • http://buvavarosavadar.iblogger.org/ley_general_de_ttulos_y_operaciones_de_crdito_cheque.pdfIn PDF document text
    • https://cdn.sqhk.co/fomanazoravu/WLjbfT4/influence_science_and_practice_book_by_robert_cialdini.pdfIn PDF document text
    • http://superheatbelt.xyz/vudodakuluvemio62z9.pdfIn PDF document text
    • http://zanartcc.net/how_much_does_therapist_earn_per_monthgystl.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/BBqhagj/gold_live_widget_gold_price_silver_price.pdfIn PDF document text
    • https://cdn.sqhk.co/murevexi/Ahjvljc/88970091621.pdfIn PDF document text
    • http://julubavixukab.66ghz.com/zifatuxoje.pdfIn PDF document text
    • http://homebig.space/absolute_value_function_graphs_worksheetszyxqf.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/ghgiheT/u_mobile_centre_kuching.pdfIn PDF document text
    • http://vuzatiriranune.22web.org/nice_guidelines_liver_cirrhosis.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/acide_olique_formule_semi_dveloppeeej11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buxozowiliva.rf.gd/glitter_background_app_for_android.pdfIn PDF document text
    • http://nolivajujereram.rf.gd/gozusifu.pdfIn PDF document text
    • http://xegukamadoso.epizy.com/42925438641.pdfIn PDF document text
    • http://zejeriwetijetez.rf.gd/celiakia_i_dieta_bezglutenowa.pdfIn PDF document text
    • http://gedesopow.rf.gd/75737317503.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_210c27de767b400298e403b96080c2b3.pdf?index=trueIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_b536fe5f56c6460c81183ae68c096ac9.pdf?index=trueIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_9b52b1cdb05f4c59aaef6e21ce5109f1.pdf?index=trueIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_0979f23f993c485ba16618b26c47932e.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2E 5004 bytes
SHA-256: ba4bb650c65d2a68532c1a526f7733cb8625c0c50d57440df70551c87130c5de
font_01_sfnt_off00011047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11047 12568 bytes
SHA-256: 6273c4b55c7d5ce62e5c972a54d894294463b87eb04c3104f3e09d7797147fe6

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